Anybody know if the FCN, PRI, ENT and CLR buttons on the BK DTMF keypads can be used for A, B, C and D functions too?

Reason for asking is because im trying to program an RC-1000 repeater controller and it takes the A, B, C and D buttons to get it into programming mode. We dont have any of the 16 digit type in order to program.

We are using the BK LPH radios for the TX and RX repeater itself and our field radios are all BK's too.